While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Remeha
How can I fix my programmer RWB2 ?
E5 Error on Remeha Avanta Plus boiler?
My Remeha Avanta 28C condensing boiler shows an error code?
Remeha Avanta plus?
Remeha Avanta Plus not not activating heating?
I have a Remeha boiler - there is no error message but the rads dont work?